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Method for preparing phosphorus-removing adsorbent by utilizing sludge of sewage treatment plant

A sewage treatment plant, phosphorus adsorbent technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of long preparation time of phosphorus removal adsorbent, and achieve low cost , Phosphorus removal performance is good, the effect of a wide range of material sources

Inactive Publication Date: 2016-06-22
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires 4 to 6 hours during the muffle furnace heat activation treatment, which makes the preparation time of phosphorus removal adsorbent longer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the present embodiment utilizing sewage treatment plant sludge to prepare dephosphorization adsorbent is as follows:

[0027] 1) Dry the remaining sludge from the sewage treatment plant in an oven at 105°C to a constant weight, then crush and grind the dried sludge to a particle size of about 2 mm for later use;

[0028] 2) Place the dried sludge with a particle size of about 2 mm in 1) in the air without isolation. 2 In the muffle furnace, the furnace temperature was raised to 690°C at a heating rate of 23°C / min. Under this condition, pyrolytic carbonization was carried out for 51 minutes. After the carbonization was completed, the pyrolysis sample was taken out after the furnace temperature was cooled to room temperature;

[0029] 3) The carbonized solid sample in 2) is crushed and ground again to a particle size of about 2 mm to obtain the carbonized sludge adsorbent.

[0030] Take by weighing 0.2g of the sludge adsorbent prepared in this e...

Embodiment 2

[0032] The method of utilizing the sewage treatment plant sludge of the present embodiment to prepare phosphorus removal adsorbent is as follows:

[0033] 1) Dry the remaining sludge from the sewage treatment plant in an oven at 80°C until the weight of the weighed sludge does not change, then crush and grind the dried sludge to a particle size of about 0.5mm for later use;

[0034] 2) Place the dried sludge with a particle size of about 0.5mm in 1) in the air without isolation. 2 In a muffle furnace, the furnace temperature was raised to 700°C at a heating rate of 22°C / min. Under this condition, pyrolytic carbonization was carried out for 40 minutes. After the carbonization was completed, the pyrolysis sample was taken out after the furnace temperature was cooled to room temperature;

[0035] 3) The carbonized solid sample in 2) is crushed and ground again to a particle size of about 0.5 mm to obtain the carbonized sludge adsorbent.

[0036] Take by weighing 0.2g of the slud...

Embodiment 3

[0038] The method of utilizing the sewage treatment plant sludge of the present embodiment to prepare phosphorus removal adsorbent is as follows:

[0039] 1) Dry the remaining sludge from the sewage treatment plant in an oven at 85°C for 48 hours, weigh the sludge without any change in quality, and then crush and grind the dried sludge to a particle size of about 5 mm for later use;

[0040] 2) Place the dried sludge with a particle size of about 5 mm in 1) in the air without isolation. 2 In the muffle furnace, the furnace temperature was raised to 700°C at a heating rate of 10°C / min. Under this condition, pyrolytic carbonization was carried out for 40 minutes. After the carbonization, the furnace temperature was cooled to room temperature and the pyrolysis sample was taken out;

[0041] 3) The carbonized solid sample in 2) is crushed and ground again to a particle size of about 5 mm to obtain the carbonized sludge adsorbent.

[0042] Take by weighing 0.2g of the sludge adsor...

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Abstract

The invention discloses a method for preparing a phosphorus removal adsorbent by using sewage treatment plant sludge, which is characterized in that it comprises the following steps: (1) drying the sewage treatment plant sludge in a constant temperature drying box at 80-105°C to constant weight; then crush and grind the dried sludge into particles with a particle size of 0.5 to 5 mm; (2), put the sludge particles treated in step (1) into a muffle furnace for pyrolytic carbonization, and pyrolytic carbonization The parameters are: the operating temperature is 500-800°C, the time is 15-90min, the heating rate is 10-25°C / min, and then the pyrolysis carbonized product is crushed and ground into particles with a particle size of 0.5-5mm to obtain the product. The phosphorus removal adsorbent of the present invention does not isolate oxygen in the muffle furnace during the preparation process, which greatly simplifies the preparation process and makes the operation more convenient. At the same time, it is prepared by using the surplus sludge of the sewage treatment plant as the raw material, which has wider applicability and is conducive to the recycling and utilization of sludge resources.

Description

technical field [0001] The invention relates to the technical field of sewage treatment and sludge resource treatment, in particular to a method for preparing a phosphorus-removing adsorbent from sewage treatment plant sludge. Background technique [0002] my country is a country that lacks water resources. With the development of economy and social progress, more and more attention has been paid to the eutrophication of water bodies. Excessive phosphorus in water bodies is one of the important reasons for the occurrence of eutrophication in water bodies. First, its input sources mainly include municipal sewage, industrial wastewater, and surface runoff in agricultural areas. Therefore, effective removal of excess phosphorus in water is the first choice to alleviate water eutrophication. The traditional phosphorus removal methods mainly include biological method and chemical precipitation method. The effect of biological phosphorus removal is easily affected by the environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58
CPCB01J20/20B01J2220/4887C02F1/281
Inventor 刘俊新张镭肖本益郭雪松
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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